Waking system in barcode scanner

ABSTRACT

A method of actuating a barcode reading platform by combining omnidirectional laser scanning and area-imaging approaches to trigger an imaging assembly in response to sensing laser pulses reflected and/or scattered by surrounding objects is disclosed. Specifically, a method of capturing an image of a barcode with a barcode scanner focuses on actuating a laser scanning system, illuminating an object with optical laser beam pulses, detecting laser beams reflected and/or scattered by the object, transmitting and analyzing a signal indicative of the detected laser beams to determine a presence of the object, and actuating a barcode reading platform.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the benefit of Chinese Patent Application for Invention No. 201710021070.9 for a Waking System in Barcode Scanner filed Jan. 12, 2017, which is hereby incorporated by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates to barcode scanning, and more particularly to a method of actuating a barcode reading platform by combining omnidirectional laser scanning and area-imaging approaches to trigger an imaging assembly in response to sensing laser pulses reflected and/or scattered by surrounding objects.

BACKGROUND

Generally speaking, barcode reading with a bioptic scanner is based on combining omnidirectional laser scanning with integrated area-imaging techniques. Many modern bioptic scanners address this requirement by implementing IR modules or image processing methods to sense the movement and wake the imaging assembly. However, the IP modules often increase the overall cost, and the image processing methods tend to exhibit poor wake up performance. Moreover, the integration level of the laser and imaging systems remains low, leading to a slow system response. For example, in U.S. Pat. No. 5,637,854 issued to Thomas, a barcode scanning is limited to sensing laser beam reflections to determine a presence of an object, underutilizing an opportunity to use the signal to wake the imaging system as well. In U.S. Pat. No. 5,280,162 issued to Marwin, a barcode scanner relies on detecting a reflected light generated by an AIM LED illumination source to wake a laser scanning system. In U.S. Pat. No. 8,196,834 issued to Vinogradov et al., a barcode scanner combines a light source, a light detector and an object sensor, thus resulting in a bulky structure with limited integration of elements.

Therefore, a need exists for a method of actuating a barcode reading platform, while having a fast response combined with lower cost and power consumption compared to the modern bioptic scanners. This can be accomplished by efficiently integrating omnidirectional laser scanning and area-imaging approaches, which may lead to an improved waking performance, reduced bulk and cost of the scanning assembly, and a power usage optimization.

SUMMARY

Accordingly, in one aspect, the present invention embraces a method of actuating a barcode reading platform by efficiently combining omnidirectional laser scanning and area-imaging approaches to trigger an imaging assembly in response to sensing laser pulses reflected and/or scattered by surrounding objects.

In an exemplary embodiment, a method of waking an area-imaging assembly in a bioptic barcode scanner focuses on aligning a scanning pattern of an omnidirectional laser scanning assembly with a field of view of an area-imaging assembly disposed within the bioptic barcode scanner, producing laser pulses, measuring and analyzing a return signal of the laser pulses to sense an object proximal to the bioptic barcode scanner, followed by waking the area-imaging assembly.

In another exemplary embodiment, a method of actuating a barcode reading platform describes scanning an area with laser pulses produced by a laser scanning system, analyzing laser pulse feedback, comparing results to a predetermined threshold to detect a presence of the object, triggering a barcode imaging system, and imaging the barcode using the barcode reading platform.

In yet another exemplary embodiment, a method of capturing an image of a barcode with a hybrid scanner focuses on actuating a laser scanning system of a hybrid scanner, illuminating an object with optical laser beam pulses, detecting laser beams reflected and/or scattered by the object, transmitting and analyzing a signal indicative of the detected laser beams to determine a presence of the object by comparing a level of the laser beams with a predetermined threshold, actuating an imaging system of the hybrid scanner, and capturing an image of the barcode.

The foregoing illustrative summary, as well as other exemplary objectives and/or advantages of the invention, and the manner in which the same are accomplished, are further explained within the following detailed description and its accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically depicts a method of waking an area-imaging assembly in a bioptic barcode scanner, according to an embodiment.

FIG. 2 schematically depicts a method of actuating a barcode reading platform, according to an embodiment.

FIG. 3 schematically depicts a method of capturing an image of a barcode with a hybrid scanner, according to an embodiment.

DETAILED DESCRIPTION

The present invention embraces a method of actuating a barcode reading platform by efficiently integrating omnidirectional laser scanning and area-imaging approaches.

FIG. 1 shows a method 100 of waking an area-imaging assembly in a bioptic barcode scanner, according to an embodiment. At 102, a scanning pattern of an omnidirectional laser scanning assembly disposed within a bioptic barcode scanner is aligned with a field of view of an area-imaging assembly disposed within the bioptic barcode scanner. At 104, one or more laser pulses are produced using the omnidirectional scanning assembly. At 106, a return signal of the one or more laser pulses reflected by one or more objects proximal to the bioptic barcode scanner is automatically measured. At 108, an object proximal to the bioptic barcode scanner is sensed by analyzing the return signal. At 110, the area-imaging assembly is woken.

In one embodiment, sensing an object can include sensing an object displaying a one-dimensional barcode. In another embodiment, sensing an object can include sensing an object displaying a two-dimensional barcode. Additionally or alternatively, analyzing the return signal can include detecting movement of the one or more objects proximal to the bioptic barcode scanner.

FIG. 2 shows a method 200 of actuating a barcode reading platform, according to an embodiment. At 202, an area proximal to a barcode reading platform is scanned for an object using laser pulses produced by a laser scanning system. At 204, laser pulse feedback produced by the laser scanning of one or more objects present in the area proximal to the barcode reading platform is automatically analyzed. At 206, results of the laser pulse feedback analysis are compared to a predetermined threshold. At 208, a presence of the object is detected. At 210, a barcode imaging system is triggered. At 212, a barcode is imaged using the barcode reading platform.

In an embodiment, the imaging system can include an area-imaging platform. Additionally or alternatively, using laser pulses produced by a laser system can include using laser pulses produced by an omnidirectional laser system.

In an embodiment, the method 200 can include counting a number of produced laser pulses, and triggering the barcode imaging system when a total laser pulse count exceeds a predetermined total pulse threshold value. Alternatively, the method 200 can include counting a number of negative laser pulses, and triggering the barcode imaging system when a negative laser pulse count exceeds a predetermined negative pulse threshold value. In an embodiment, the method 200 can further include counting time over which laser pulses are produced, and triggering the barcode imaging system when a negative laser pulse time exceeds a predetermined time threshold value. For example, the predetermined time threshold value may constitute 50% of total time.

FIG. 3 shows a method 300 of capturing an image of a barcode with a hybrid scanner, according to an embodiment. At 302, a laser scanning system of a hybrid scanner is actuated. At 304, an object is illuminated with one or more pulses of an optical laser beam generated by a laser scanning assembly disposed within the hybrid scanner. At 306, one or more laser beams reflected and/or scattered by the object are detected. At 308, a signal indicative of the detected laser beams is transmitted. At 310, the transmitted signal is analyzed to determine a presence of the object by comparing a level of the reflected and/or scattered laser beams with a predetermined threshold. At 312, an imaging system of the hybrid scanner is automatically actuated. At 314, an image of the barcode is captured.

In an embodiment, the laser scanning system and the imaging system can be actuated simultaneously. Additionally, the method 300 can include digitizing the captured image of the barcode to create a digitized image, transmitting the digitized image of the barcode to a processing assembly, and decoding the digitized image.

Device and method components are meant to show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. In various embodiments, the sequence in which the elements of appear in exemplary embodiments disclosed herein may vary. Two or more method steps may be performed simultaneously or in a different order than the sequence in which the elements appear in the exemplary embodiments.

To supplement the present disclosure, this application incorporates entirely by reference the following commonly assigned patents, patent application publications, and patent applications:

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In the specification and/or figures, typical embodiments of the invention have been disclosed. The present invention is not limited to such exemplary embodiments. The use of the term “and/or” includes any and all combinations of one or more of the associated listed items. The figures are schematic representations and so are not necessarily drawn to scale. Unless otherwise noted, specific terms have been used in a generic and descriptive sense and not for purposes of limitation. 

1. A method of waking an area-imaging assembly in a bioptic barcode scanner, comprising: aligning a scanning pattern of an omnidirectional laser scanning assembly disposed within a bioptic barcode scanner with a field of view of an area-imaging assembly disposed within the bioptic barcode scanner; producing one or more laser pulses using the omnidirectional scanning assembly; automatically measuring a return signal of the one or more laser pulses reflected by one or more objects proximal to the bioptic barcode scanner; sensing an object proximal to the bioptic barcode scanner by analyzing the return signal; and waking the area-imaging assembly.
 2. The method according to claim 1, wherein sensing an object includes sensing an object displaying a one-dimensional barcode.
 3. The method according to claim 1, wherein sensing an object includes sensing an object displaying a two-dimensional barcode.
 4. The method according to claim 1, wherein analyzing the return signal includes detecting movement of the one or more objects proximal to the bioptic barcode scanner.
 5. A method of actuating a barcode reading platform, comprising: scanning an area proximal to a barcode reading platform for an object using laser pulses produced by a laser scanning system; automatically analyzing laser pulse feedback produced by the laser scanning of one or more objects present in the area proximal to the barcode reading platform; comparing results of the laser pulse feedback analysis to a predetermined threshold; detecting a presence of the object; triggering a barcode imaging system; and imaging a barcode using the barcode reading platform.
 6. The method according to claim 5, wherein the imaging system comprises an area-imaging platform.
 7. The method according to claim 5, further including counting a number of produced laser pulses, and triggering the barcode imaging system when a total laser pulse count exceeds a predetermined total pulse threshold value.
 8. The method according to claim 5, further including counting a number of negative laser pulses, and triggering the barcode imaging system when a negative laser pulse count exceeds a predetermined negative pulse threshold value.
 9. The method according to claim 5, further including counting time over which laser pulses are produced, and triggering the barcode imaging system when a negative laser pulse time exceeds a predetermined time threshold value.
 10. The method according to claim 9, wherein the predetermined time threshold value comprises 50% of total time.
 11. The method according to claim 5, wherein using laser pulses produced by a laser system includes using laser pulses produced by an omnidirectional laser system.
 12. A method of capturing an image of a barcode with a hybrid scanner, comprising: actuating a laser scanning system of a hybrid scanner; illuminating an object with one or more pulses of an optical laser beam generated by a laser scanning assembly disposed within the hybrid scanner; detecting one or more laser beams reflected and/or scattered by the object; transmitting a signal indicative of the detected reflected and/or scattered laser beams; analyzing the transmitted signal to determine a presence of the object by comparing a level of the reflected and/or scattered laser beams with a predetermined threshold; automatically actuating an imaging system of the hybrid scanner; and capturing an image of the barcode.
 13. The method according to claim 12, wherein the laser scanning system and the imaging system are actuated simultaneously.
 14. The method according to claim 12, further including digitizing the captured image of the barcode to create a digitized image.
 15. The method according to claim 14, further including transmitting the digitized image of the barcode to a processing assembly.
 16. The method according to claim 15, further including decoding the digitized image. 